CVE-2026-83716
8.8HighPublished 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-122
Impact
A guest VM user can escape to the host and execute arbitrary code with host-level privileges. The attacker needs an existing local account inside a guest VM.
Root cause
A heap-based buffer overflow in the Windows Hyper-V hypervisor allows guest memory writes outside allocated bounds.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Fix & remediation
Install the Microsoft security update for Hyper-V from the MSRC advisory; if patching must wait, restrict untrusted local user access to guest virtual machines.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.